Weil-McLain BCP-8X - Manual (Page 11)

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Output A followed by the higher stage of the same boiler and wire it to Stage B.
Lo Hi
Unit1
Stages
Lo Hi
Unit2
Stages
3 5
Stage A
7
Stage B
9
Stage C
11
Stag Stage D
6 8 10 4
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(389-900-226) using the provided 6-pin phone cable.
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to the second extension or the420MOD Interface (389-900-226).
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be to use the 420MOD Interface (389-900-226) to provide a 4-20mA set point signal to the BCP-8S.
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communication problem.
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Extension B requires the Switch to be set to "B" will operate stages "Q" through "X".
Ext A Ext B
Connecting BCP-8 to Two Extension Panels
and 420MOD Interface using RS485
BCP-8
HYDRONIC SEQUENCING CONTROL
SYSTEM
DHW PUMP
INPUT RATINGS:
115VAC 60Hz, 12VA MAX
Use Copper Conductors Only.
CAUTION: Risk of Electric Shock.
PWR
L N
1 2
SENSORS MUST BE GOLD SERIES
SYSTEM
3
DHW
PUMP
5
Stage A
7
Stage B
9
Stage C
11 13
Stage E
15
Stage F
17
Stage D
6 8 10 12 14 16 18
RS485
SYS= 144 F OD= 35 F
<AB > DE GH JK
HI LO -- OFF
4
Stage G
19
Stage H
21
OUTDOOR TEMP
27 29 31
DHW
33
SHUTDOWN /TSTAT /SETBACK
35
RETURN TEMP
20 22 28 30 32 34 36
STAGE MENU
Stage E
Stage F
Stage G
Stage H
Stage A
Stage B
Stage C
Stage D
25 26
PRESS
+ -
37 38
PROVE TEMP
PROGRAM RUN
23 24
COMB.
AIR
DO NOT APPLY ANY VOLTAGE TO INPUT TERMINALS
COMB. AIR
ENCLOSED ENERGY MANAGEMENT EQUIPMENT
LISTED 99RA
C US
O
P
Power
CAUTION: Risk of Electric Shock.
PWR
L N
1 2
I
3 4
J
5 6
K
7 8
L
9 10
M
11 12
EXTENSION MODULE
RS-485
Ext A
INPUT RATINGS:
115VAC 60Hz, 12VA MAX
OUTPUT RATINGS:
120VAC, 6A RESISTIVE
1A PILOT DUTY, 15A TOTAL
FOR ALL CIRCUITS
Ext B
L
M
N
Comm
T
U
V
W
X
N
13 14
Q S U R T V
BCP-8X A
Use Copper Conductors Only.
I
J
K
Q
R
S
O
15 16
P
17 18
W X
O
P
Power
CAUTION: Risk of Electric Shock.
PWR
L N
1 2
I
3 4
J
5 6
K
7 8
L
9 10
M
11 12
EXTENSION MODULE
RS-485
Ext A
INPUT RATINGS:
115VAC 60Hz, 12VA MAX
OUTPUT RATINGS:
120VAC, 6A RESISTIVE
1A PILOT DUTY, 15A TOTAL
FOR ALL CIRCUITS
Ext B
L
M
N
Comm
T
U
V
W
X
N
13 14
Q S U R T V
BCP-8X B
Use Copper Conductors Only.
I
J
K
Q
R
S
O
15 16
P
17 18
W X
4-20 mA EMS
4-20mA INPUT
+ Signal GND
1 2 3
RS485
EXTENSION
CONNECTORS
420MOD EMS Interface
4-20mA
EMS Signal
(+)
(-)
6 Pin Phone Cable (provided with Extension)
6 Pin Phone Cable (provided with 420MOD EMS Interface)
SEQUENCING CONTROL EXTENSION
BCP-8X
SEQUENCING CONTROL EXTENSION
BCP-8X BCP-8W